/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.jdbc.datasource.init;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

import javax.sql.DataSource;

/**
 * Used to populate a database during initialization.
 *
 * @author Dave Syer
 * @see DatabasePopulator
 * @since 3.0
 */
public class DataSourceInitializer implements InitializingBean, DisposableBean {

    private DataSource dataSource;

    private DatabasePopulator databasePopulator;

    private DatabasePopulator databaseCleaner;

    private boolean enabled = true;


    /**
     * The {@link DataSource} to populate when this component is initialized.
     * Mandatory with no default.
     *
     * @param dataSource the DataSource
     */
    public void setDataSource(DataSource dataSource) {
        this.dataSource = dataSource;
    }

    /**
     * The {@link DatabasePopulator} to use to populate the data source.
     * Mandatory with no default.
     *
     * @param databasePopulator the database populator to use.
     */
    public void setDatabasePopulator(DatabasePopulator databasePopulator) {
        this.databasePopulator = databasePopulator;
    }

    /**
     * Set a script execution to be run in the bean destruction callback,
     * cleaning up the database and leaving it in a known state for others.
     *
     * @param databaseCleaner the database script executor to run on destroy
     */
    public void setDatabaseCleaner(DatabasePopulator databaseCleaner) {
        this.databaseCleaner = databaseCleaner;
    }

    /**
     * Flag to explicitly enable or disable the database populator.
     *
     * @param enabled true if the database populator will be called on startup
     */
    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }


    /**
     * Use the populator to set up data in the data source.
     */
    public void afterPropertiesSet() {
        if (this.databasePopulator != null && this.enabled) {
            DatabasePopulatorUtils.execute(this.databasePopulator, this.dataSource);
        }
    }

    /**
     * Use the populator to clean up data in the data source.
     */
    public void destroy() {
        if (this.databaseCleaner != null && this.enabled) {
            DatabasePopulatorUtils.execute(this.databaseCleaner, this.dataSource);
        }
    }

}
